PCI: designware: Reject MSI-X IRQs
PCI: designware: Reject MSI-X IRQs

The DesignWare PCIe MSI hardware does not support MSI-X IRQs.  Setting
those up failed as a side effect of a bug which was fixed by 91f8ae823f2b
("PCI: designware: Setup and clear exactly one MSI at a time").

Now that this bug is fixed, MSI-X IRQs need to be rejected explicitly;
otherwise devices trying to use them may end up with incorrectly working
interrupts.

Fixes: 91f8ae823f2b ("PCI: designware: Setup and clear exactly one MSI at a time")
Signed-off-by: Lucas Stach <48c9e973d8f86eb0cdae200124c5925db7587c4e@pengutronix.de>
Signed-off-by: Bjorn Helgaas <f10ec01be0c6b54271af5c550cd257810bdf3268@google.com>
Acked-by: Jingoo Han <fc379137a64feb86ce38ec5811a14280acc1ccfc@samsung.com>
CC: 4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org	# v3.18+

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs